15 Carat Tanzanite Cushion Cut Cocktail and Diamond Ring Platinum Yellow Gold

An impressive vintage 1990s 12.95 carat jade and 18 karat yellow gold cocktail ring; part of our diverse vintage jewelry and estate jewelry collections. This fine and impressive vintage cabochon cut gemstone ring has been crafted in 18k yellow gold. The substantial ring shank displays a 12.95Ct bezel set cabochon cut jade. The bezel setting has a subtle stepped design that surrounds the stone. The elevated and plain ring shoulders integrate with the domed setting and blend seamlessly with the plain ring shank. The ring is hallmarked to the underside of the shoulder with the 18k gold fineness marks (750 18K) and maker's mark 'P'. This impressive vintage jade ring in yellow gold...

1970's Tanzanite and diamond ring. 4.08ct cushion cut bezel set Tanzanite center stone placed in an 18k yellow gold and platinum ring. Accented wit...

This piece comes directly from the vault of Atlantic Diamond Company—a family-run fine jewelry house with nearly 50 years of history serving elite collectors, retailers, and dealers across the country. As the founder shifts focus to new ventures, he’s releasing a final selection of investment-grade gemstone and diamond pieces—offered exclusively to 1stDibs buyers at exceptional, below-market prices. This is not a liquidation or sale—it’s a one-time opportunity to acquire legacy-level jewelry at true insider value. Each piece is final; once sold, it will not be restocked. This is a cocktail ring that showcases a 1.38 carat cushion cut tanzanite. It has diamonds around the gemstone totaling .57 carats. Designed in brightly polished platinum, this gorgeous ring...

A unique ring, it features a natural oval-cut amethyst bezel set in the centre weighing 14 carat surrounded by a halo of white round brilliant-cut diamonds weighing 0.36 carat. The a...